When light strikes chlorophyll molecules of ps ii, they lose electrons, which are ultimately replaced by

When  light   chlorophyll  molecules  of  ps  ii  they   lose  electrons,  which  are  ultimately  replaced  by   splitting  water

   The  light  absorbed  by   chlorophyll  cause  a  transfer  of  electrons   and  H+   from  water   molecule   which  are  already  present.  This   cause   the  water   molecules  to   split   into    molecular  oxygen   and  H+  ion.  The  lost   electron  are  ultimately   replaced  by  other  electron  obtained  by  splitting  water.

It was necessary to redeem the world and he knew that his son was the only way